using System;
using System.Collections.Generic;

namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
{
	/// <summary>
	/// A null joystick object
	/// </summary>
	public class NullJoystick : IJoystick
	{
		private int _joyLine;
		private SpectrumBase _machine;

		#region Construction

		public NullJoystick(SpectrumBase machine, int playerNumber)
		{
			_machine = machine;
			_joyLine = 0;
			_playerNumber = playerNumber;

			ButtonCollection = new List<string>
			{

			}.ToArray();
		}

		#endregion

		#region IJoystick

		public JoystickType JoyType => JoystickType.NULL;

		public string[] ButtonCollection { get; set; }

		private int _playerNumber;
		public int PlayerNumber
		{
			get => _playerNumber;
			set => _playerNumber = value;
		}

		/// <summary>
		/// Sets the joystick line based on key pressed
		/// </summary>
		public void SetJoyInput(string key, bool isPressed)
		{
			var pos = GetBitPos(key);
			if (isPressed)
				_joyLine |= (1 << pos);
			else
				_joyLine &= ~(1 << pos);
		}

		/// <summary>
		/// Gets the state of a particular joystick binding
		/// </summary>
		public bool GetJoyInput(string key)
		{
			var pos = GetBitPos(key);
			return (_joyLine & (1 << pos)) != 0;
		}

		#endregion

		/// <summary>
		/// Active bits high
		/// 0 0 0 F U D L R
		/// </summary>
		public int JoyLine
		{
			get => _joyLine;
			set => _joyLine = value;
		}

		/// <summary>
		/// Gets the bit position of a particular joystick binding from the matrix
		/// </summary>
		public int GetBitPos(string key)
		{
			int index = Array.IndexOf(ButtonCollection, key);
			return index;
		}


		/*
       public readonly string[] _bitPos = new string[]
       {
           "P1 Right",
           "P1 Left",
           "P1 Down",
           "P1 Up",
           "P1 Button"
       };
       */
	}
}